Ferber, R. (2015). Key Concepts in Philosophy: An Introduction. Academia Press.
Lua i Stíl Chicago (17ú heag.)Ferber, Rafael. Key Concepts in Philosophy: An Introduction. Academia Press, 2015.
Lua MLA (9ú heag.)Ferber, Rafael. Key Concepts in Philosophy: An Introduction. Academia Press, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.